(19)

(11)

EP 2 406 490 A2

(12)

(88) Date of publication A3: 23.06.2011 (43) Date of publication: 18.01.2012 Bulletin 2012/03 (21) Application number: 10706674.8 (22) Date of filing: 08.03.2010

(51) International Patent Classification (IPC):  F03D 1/00(2006.01) F03D 11/00(2006.01) (86) International application number: PCT/EP2010/052881 (87) International publication number: WO 2010/102967 (16.09.2010 Gazette 2010/37)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 13.03.2009 DK 200900358 13.03.2009 US 159997 P (71) Applicant: Vestas Wind Systems A/S 8200 Aarhus N (DK)	(72) Inventors: NIELSEN, Flemming, Selmer DK-8450 Hammel (DK) MARKUSSEN, Erik DK-6920 Videbæk (DK)